• 1 Download Firefox For All languages And Systemsv41 {web link}

same message "Firefox Setup 42.0 (1).exec couldn't be downloaded" This appears at the bottom of the screen to the right of this message I have the option to: retry, cancel, view downloads

Using another computer, Download Firefox Full Version For All languages And Systems {web link} onto a thumb drive. After, plug the thumb into your system. https://www.mozilla.org/en-US/firefox/41.0/system-requirements/

Fred the Release has been Firefox 42.0 since early Tuesday.

It is possible that Anti-Virus software is causing problems. Try to disable Anti-Virus software temporarily to see if that makes a difference.

Boot the computer in Windows Safe Mode with network support (press F8 on the boot screen) to see if that helps.

• http://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/
• http://www.7tutorials.com/4-ways-boot-safe-mode-windows-10